<?php

namespace app\admin\controller\exchange;

use app\common\controller\Backend;
use fast\Random;
use think\Db;
use think\exception\PDOException;
use think\exception\ValidateException;

/**
 *
 *
 * @icon fa fa-exchange
 */
class Exchange extends Backend
{

    /**
     * Exchange模型对象
     * @var \app\admin\model\Exchange
     */
    protected $model = null;

    public function _initialize()
    {
        parent::_initialize();
        $this->model = new \app\admin\model\Exchange;

    }

    /**
     * 默认生成的控制器所继承的父类中有index/add/edit/del/multi五个基础方法、destroy/restore/recyclebin三个回收站方法
     * 因此在当前控制器中可不用编写增删改查的代码,除非需要自己控制这部分逻辑
     * 需要将application/admin/library/traits/Backend.php中对应的方法复制到当前控制器,然后进行修改
     */


    /**
     * 查看
     */
    public function index()
    {
        //当前是否为关联查询
        $this->relationSearch = true;
        //设置过滤方法
        $this->request->filter(['strip_tags', 'trim']);
        if ($this->request->isAjax()) {
            //如果发送的来源是Selectpage，则转发到Selectpage
            if ($this->request->request('keyField')) {
                return $this->selectpage();
            }
            list($where, $sort, $order, $offset, $limit) = $this->buildparams();
            $total = $this->model
                ->with(['user'])
                ->where($where)
                ->order($sort, $order)
                ->count();

            $list = $this->model
                ->with(['user'])
                ->where($where)
                ->order($sort, $order)
                ->limit($offset, $limit)
                ->select();

            foreach ($list as $row) {

                $row->getRelation('user')->visible(['username']);
            }
            $list = collection($list)->toArray();
            $result = array("total" => $total, "rows" => $list);

            return json($result);
        }
        return $this->view->fetch();
    }

    public function add()
    {
        if ($this->request->isPost()) {

            $activity_id = $this->request->get('activity_id');

            $params = $this->request->post("row/a");
            $num = $params['num'];
            $_data['class'] = $params['class'];
            $_data['activity_id'] = $activity_id;
            for ($i = 0; $i < $num; $i++) {
                $_data['code'] = $this->createCode($activity_id);

                 $this->model->create($_data);
            }

            $this->success("兑换码生成成功，一共生成" . $num . "个");
        }
        return $this->view->fetch();
    }

    private function createCode($activity_id)
    {
        $code = $activity_id . Random::alpha(3) . Random::alnum(4);
        $n = db::table('fa_exchange')->where('code', $code)->count();
        if ($n > 0) {
            $this->createCode($activity_id);
        }
        return $code;
    }
}
